CN218695771U - Press machine - Google Patents

Abstract

The utility model relates to a pressure equipment machine technical field especially relates to a press. The press comprises an installation part, a driving component, a first connecting part, a buffering component and a pressure sensor, the driving component is arranged on the installation part, the first connecting part is arranged at the output end of the driving component, the buffering component is arranged at the tail end of the first connecting part, the tail end of the buffering component is connected with a pressure head, the pressure head is used for press-fitting a workpiece, the driving component can drive the first connecting part and drive the buffering component and the pressure head on the first connecting part to move along a preset direction, when the pressure head presses the workpiece, the buffering component is used for buffering the pressure head, the pressure sensor is arranged between the pressure head and the buffering component, and the pressure sensor is used for detecting the pressure applied to the workpiece by the pressure head. Through setting up buffering subassembly, can realize better buffering effect between pressure head and the work piece, prevent that the work piece from being crushed, damaged.

Description

Press machine

Technical Field

The utility model relates to a pressure equipment machine technical field especially relates to a press.

Background

Electronic circuit boards, or PCBs in general, are often referred to as circuit board assemblies, or PCBAs, where the components on the circuit boards may be surface mount components, interposer components, compression components, or assemblies. The press fitting is a production process for realizing the connection of the pressing element and the circuit board through mechanical external force without welding.

In the prior art, a press is generally used to press-fit the circuit board and the pressing member element. The press comprises a driving assembly and a pressure head, wherein the driving assembly drives the pressure head to abut against a workpiece to be pressed, so that the workpiece is pressed. However, the press has a large dead weight when pressing down, and the circuit board is easily brittle and broken, so that the bearing capacity is limited, and if the press head directly presses and mounts the electronic circuit board and the pressing element under the driving action of the driving assembly, the circuit board is easily crushed, and the workpiece is easily scrapped.

Therefore, it is desirable to provide a press to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a press can realize better cushioning effect to the pressure head, and can detect the pressure head and apply in the pressure of treating the pressure equipment work piece, realizes the accurate pressure equipment of work piece.

In order to realize the purpose, the following technical scheme is provided:

a press, comprising:

a mounting member;

the driving assembly is arranged on the mounting piece;

the first connecting piece is arranged at the output end of the driving assembly;

the buffer assembly is arranged at the tail end of the first connecting piece, the tail end of the buffer assembly is connected with a pressure head, the pressure head is used for press-fitting a workpiece, the driving assembly can drive the first connecting piece to drive the buffer assembly and the pressure head on the buffer assembly to move along a preset direction, and when the pressure head presses the workpiece, the buffer assembly is used for buffering the pressure head; and

and the pressure sensor is arranged between the pressure head and the buffer assembly and is used for detecting the pressure exerted on the workpiece by the pressure head.

Preferably, the buffer assembly includes:

the second connecting piece is connected with the first connecting piece;

the guide shaft penetrates through the second connecting piece along the preset direction and can slide along the second connecting piece, and one end of the guide shaft is connected to the pressure head;

the first elastic piece is sleeved on the guide shaft, one end of the first elastic piece is abutted to the second connecting piece, and the other end of the first elastic piece is abutted to the pressure head.

Preferably, the buffer assembly further comprises:

one end of the guide shaft, which is far away from the pressure head, extends out of the second connecting piece, the second elastic piece is sleeved on the part of the guide shaft, which extends out of the second connecting piece, and one end of the second elastic piece is abutted against the second connecting piece;

the limiting part is arranged at one end, far away from the pressure head, of the guide shaft, and the other end of the second elastic part abuts against the limiting part.

Preferably, the driving assembly includes:

the driving piece is arranged on the mounting piece;

the transmission part is connected to the output end of the driving part, the first connecting piece is arranged at the output end of the transmission part, and the driving part can drive the pressure head to move in the reciprocating direction in the preset direction.

Preferably, the transmission part includes:

the screw rod is connected to the output end of the driving piece and extends along the preset direction;

and the nut is screwed on the screw rod and is connected with the first connecting piece.

Preferably, the press further comprises:

the supporting seat is installed on the mounting part, and the lead screw is rotatably connected to the supporting seat.

Preferably, the driving assembly further includes a sliding member, the sliding member includes a guide rail and a slider, the guide rail is mounted on the mounting member and extends along the preset direction, and the slider is connected to the first connecting member and slidably connected to the guide rail.

As a preferred scheme, the press further comprises a photoelectric assembly, the photoelectric assembly comprises a shielding piece, a first photoelectric sensor, a second photoelectric sensor and a third photoelectric sensor, the first photoelectric sensor, the second photoelectric sensor and the third photoelectric sensor are arranged on the mounting piece and are sequentially arranged from top to bottom, the first photoelectric sensor is used for detecting the upper limit position of the sliding block, the second photoelectric sensor is used for detecting the origin position of the sliding block, the third photoelectric sensor is used for detecting the lower limit position of the sliding block, and the shielding piece is arranged on the first connecting piece and is located on one side of the sliding block.

Preferably, a flexible part is arranged on one surface of the pressure head, which is in contact with the workpiece.

Preferably, the flexible member is made of an insulating material.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a press, through setting up the buffering subassembly between pressure head and first connecting piece, in the pressure equipment process, can realize the better buffering effect to the pressure head, prevent that the work piece from being crushed, damaged or scrapped; through set up pressure sensor between pressure head and first connecting piece, can the output of accurate detection press, realize accurate pressure equipment.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a press according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of the press provided by the embodiment of the present invention.

Reference numerals:

10. a mounting member;

20. a drive assembly; 21. a drive member; 22. a transmission section; 221. a lead screw; 222. a nut; 223. a coupling; 23. a sliding member; 231. a guide rail; 232. a slider;

30. a first connecting member;

40. a supporting seat;

50. a buffer assembly; 51. a second connecting member; 511. a body; 512. a linear bearing; 52. a guide shaft; 53. a first elastic member; 54. a limiting member; 55. a second elastic member;

60. a pressure sensor;

70. a pressure head; 71. a third connecting member; 72. briquetting; 73. a flexible member;

80. an optoelectronic component; 81. a shield; 82. a first photosensor; 83. a second photosensor; 84. a third photosensor.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present invention, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The embodiment provides a press, and the press is used for realizing press fitting between a circuit board and a pressing element. Specifically, the press is arranged on a workbench of a frame, the frame is provided with a case, and electric elements, control components and the like for controlling the operation of the press are placed in the case.

Specifically, as shown in fig. 1, the press provided in this embodiment includes a driving assembly 20, a first connecting member 30 and a pressing head 70, wherein one end of the first connecting member 30 is connected to an output end of the driving assembly 20, and the other end is connected to the pressing head 70, and the first connecting member 30 is a block-shaped structure and plays a role of intermediate connection. The driving assembly 20 is capable of driving the first link 30 and the ram 70 thereon to move in a predetermined direction. For convenience of explanation, in the present embodiment, the preset direction is defined as the X direction in fig. 1, and the workpiece refers to the circuit board and the pressing member element thereon. When the workpiece is pressed, the worker places the circuit board and the pressing member element on the workbench, and drives the pressing head 70 to move towards the direction close to the workpiece through the driving assembly 20, so that a certain pressure is applied to the circuit board and the pressing member element, and the press-fitting of the circuit board and the pressing member element is further realized.

Specifically, as shown in fig. 1, the press further includes a mounting member 10, the mounting member 10 being an L-shaped plate member for mounting the driving assembly 20. Drive assembly 20 includes driving piece 21 and transmission portion 22, and driving piece 21 sets up on installed part 10, and transmission portion 22 connects in the output of driving piece 21, and first connecting piece 30 sets up in the output of transmission portion 22, and driving piece 21 can drive the automatic reciprocating motion of head 70 along the direction of predetermineeing through transmission portion 22, and degree of automation is higher, has saved the manpower, and the commonality is stronger.

Specifically, as shown in fig. 1, the driving member 21 is a servo motor. The transmission part 22 includes a screw 221 and a nut 222, the screw 221 is connected to the output end of the driving member 21, the nut 222 is screwed on the screw 221 and connected to the first connecting member 30, and the ram 70 is connected to the first connecting member 30. In operation, the servo motor drives the lead screw 221 to rotate, so that the driving nut 222 drives the first connecting member 30 and the pressing head 70 thereon to move along a predetermined direction. This kind of drive mode bearing capacity is great, and transmission precision is higher, and the noise is low and transmission efficiency is high, can carry out accurate adjustment to the position of first connecting piece 30, and then carries out accurate adjustment to the position of pressure head 70, guarantees the accurate pressure equipment of pressure head 70 to the work piece.

Further, as shown in fig. 1, the transmission part 22 further includes a coupler 223, the coupler 223 is disposed between the driving member 21 and the lead screw 221 for connecting the output end of the driving member 21 and the lead screw 221, and the coupler 223 can compensate the offset between the output end of the driving member 21 and the lead screw 221 caused by inaccurate manufacture and installation, deformation or thermal expansion during operation, and the like, and can alleviate impact and absorb shock, thereby further ensuring precise press-fitting of the pressing head 70 on the workpiece.

Further, as shown in fig. 1, the driving assembly 20 further includes a sliding member 23, the sliding member 23 includes a guide rail 231 and a slider 232, the guide rail 231 is mounted on the mounting member 10 and extends in a predetermined direction, and the slider 232 is connected to the first connecting member 30 and slidably connected to the guide rail 231. In the process that the driving member 21 drives the first connecting member 30 to move along the preset direction, the sliding block 232 can slide along the guide rail 231, so that the first connecting member 30 is guided to a certain extent, the sliding friction force is reduced, and the first connecting member 30 is ensured to move stably and smoothly.

Further, as shown in fig. 1, the mounting member 10 is provided with a support base 40, and the screw 221 is rotatably connected to the support base 40. The support seat 40 can realize a stable support effect on the lead screw 221, so that the lead screw 221 rotates stably, and the precise press-fitting of the pressing head 70 on the workpiece is further ensured.

Further, as shown in fig. 1, the press further includes a photoelectric assembly 80, the photoelectric assembly 80 includes a shielding member 81, and a first photoelectric sensor 82, a second photoelectric sensor 83, and a third photoelectric sensor 84 that are disposed on the mounting member 10 and sequentially arranged from top to bottom, the first photoelectric sensor 82 is configured to detect an upper limit position of the slider 232, the second photoelectric sensor 83 is configured to detect an initial position of the slider 232, the third photoelectric sensor 84 is configured to detect a lower limit position of the slider 232, the shielding member 81 is disposed on the first connecting member 30 and located at one side of the slider 232, the first photoelectric sensor 82, the second photoelectric sensor 83, and the third photoelectric sensor 84 are electrically connected to the control assembly, and when the shielding member 81 passes through the corresponding photoelectric sensor, the control assembly controls the driving member 21 to stop working, so that the slider 232 stops moving at the corresponding position.

It can be understood that the upper limit position is the position where the sliding block 232 slides to the topmost end of the guide rail 231, the lower limit position is the position where the sliding block 232 slides to the bottommost end of the guide rail 231, and when the shielding member 81 passes through the position where the first photoelectric sensor 82 or the third photoelectric sensor 84 is located, the driving member 21 stops working, so that the sliding block 232 is prevented from slipping off the guide rail 231. The initial position may be any position between the upper limit position and the lower limit position, and when the press is not operating, the shielding member 81 is located at the position of the second photoelectric sensor 83, and the sliding block 232 stops at the initial position, which is the position where the sliding block 232 starts to operate. It should be noted that the control component belongs to the prior art, and any control component capable of implementing the above functions may be adopted in the present embodiment.

In the prior art, since the press has a large self weight when pressing down, and the material of the circuit board is easily brittle, the bearing capacity is limited, and if the press head 70 directly presses and mounts the electronic circuit board and the pressing element under the driving force of the driving assembly 20, the circuit board is easily crushed, and the workpiece is easily scrapped.

In order to solve the above problem, as shown in fig. 1, the press provided in this embodiment further includes a buffering assembly 50, wherein the buffering assembly 50 is disposed at the end of the first connecting member 30, and the pressing head 70 is connected to the end of the buffering assembly 50, and when the pressing head 70 presses the workpiece, the buffering assembly 50 is used for buffering the pressing head 70, so as to prevent the workpiece from being damaged or damaged by pressure and causing the workpiece to be discarded.

Specifically, as shown in fig. 1, the buffering assembly 50 includes a second connecting member 51, a guide shaft 52, and a first elastic member 53, wherein the second connecting member 51 is connected to the first connecting member 30, the guide shaft 52 penetrates the second connecting member 51 along a predetermined direction and can slide along the second connecting member 51, and one end of the guide shaft 52 is connected to the pressure head 70. The guide shaft 52 is in plug-in fit with the second connecting piece 51, and plays a certain role in guiding the pressure head 70 so as to enable the pressure head 70 to move along a preset direction relative to the second connecting piece 51, thereby ensuring the press-fitting precision of the workpiece. The first elastic member 53 is sleeved on the guide shaft 52, one end of the first elastic member 53 abuts against the second connecting member 51, the other end of the first elastic member 53 abuts against the pressure head 70, and the guide shaft 52 can play a certain guiding role for the first elastic member 53, so that the first elastic member 53 can only stretch along the axis direction of the first elastic member 53. When the pressing head 70 presses against the workpiece, the second connecting member 51 presses against the first elastic member 53 downward, and simultaneously the pressing head 70 presses against the first elastic member 53 upward, at this time, the first elastic member 53 is compressed to realize a buffering effect. Among them, the first elastic member 53 is preferably a spring.

Further, as shown in fig. 1, the buffering assembly 50 further includes a limiting member 54 and a second elastic member 55, wherein one end of the guiding shaft 52, which is far away from the pressing head 70, extends to the outside of the second connecting member 51, the second elastic member 55 is sleeved on a portion of the guiding shaft 52, which extends to the outside of the second connecting member 51, the limiting member 54 is disposed at one end of the guiding shaft 52, which is far away from the pressing head 70, one end of the second elastic member 55 abuts against the second connecting member 51, and the other end abuts against the limiting member 54. Among them, the second elastic member 55 is preferably a spring.

Further, the press machine further comprises a pressure sensor 60, and the pressure sensor 60 is arranged on a side of the second connecting member 51 facing the ram 70. The pressure sensor 60 is used to detect the amount of pressure exerted by the ram 70 on the workpiece. When the press does not work, the second elastic element 55 is in a compressed state and abuts against the second connecting element 51, the first elastic element 53 is also in a compressed state and abuts against the second connecting element 51, at this time, the force of the first elastic element 53 abutting against the second connecting element 51 is equal to the force of the second elastic element 55 abutting against the second connecting element 51, so that the pressure head 70 is in a balanced state before work, the force can enable the pressure sensor 60 to just abut against the pressure head 70, and the pressure detected by the pressure sensor 60 is zero at this time. Through the cooperation of the first elastic member 53 and the second elastic member 55, a situation that the pressure sensor 60 cannot detect pressure because the pressure head 70 starts to press the workpiece due to a gap between the pressure head 70 and the pressure sensor 60 or a situation that the pressure sensor 60 detects pressure because the pressure head 70 does not start to press the workpiece due to the pressure head 70 being pressed against the pressure sensor 60 before the work is not started can be avoided, so that the pressure sensor 60 can accurately detect the pressure exerted on the workpiece by the pressure head 70.

It should be noted that the pressure sensor 60 is electrically connected to the control component, the control component can adjust the pressure applied by the pressure head 70 on the workpiece according to the data fed back by the pressure sensor 60, and when the pressure applied by the pressure sensor 60 on the workpiece reaches the preset pressure required by the workpiece, the control component controls the driving component 21 to stop rotating, so as to realize precise press fitting of the workpiece, and improve the automation degree of press fitting of the workpiece.

Specifically, as shown in fig. 1, the second connector 51 includes a body 511 and a linear bearing 512, the linear bearing 512 is disposed in the second connector 51 along a predetermined direction and sleeved outside the guide shaft 52, and the guide shaft 52 can slide along the linear bearing 512. The linear bearing 512 can reduce the friction between the guide shaft 52 and the second link 51, so that the guide shaft 52 slides more smoothly along the second link 51, and the buffering effect of the buffering assembly 50 is further improved.

Further, as shown in fig. 2, the number of the buffer groups formed by the guide shaft 52, the linear bearing 512, the first elastic member 53, the limiting member 54 and the second elastic member 55 is two, and the two buffer groups are arranged at intervals and symmetrically along the length direction of the second connecting member 51.

As shown in fig. 1, the pressing head 70 includes a third connecting member 71 and a pressing block 72, the third connecting member 71 is connected to the second connecting member 51 through the guide shaft 52, the pressing block 72 is connected to a bottom surface of the third connecting member 71, and when the pressing head 70 presses the workpiece, the pressing block 72 presses against the workpiece to press the workpiece.

Further, as shown in fig. 1, the indenter 70 further includes a flexible member 73, and the flexible member 73 is provided on a side of the indenter 70 contacting the workpiece. By arranging the flexible piece 73, the pressing block 72 can be prevented from directly contacting with the workpiece to cause the workpiece to be crushed or damaged, so that the workpiece is prevented from being scrapped. In addition, the flexible member 73 is made of an insulating material, so that on one hand, substances such as dust particles can be prevented from being electrostatically adsorbed, and the substances such as the dust particles are prevented from being conductive after adsorbing moisture in the air, and further, the workpiece is prevented from being short-circuited; on the other hand, the workpiece breakdown caused by electrostatic discharge is prevented.

For ease of understanding, the working principle of the press is explained in connection with fig. 1:

when the press is started, the control assembly controls the driving member 21 to rotate, the driving member 21 drives the lead screw 221 to rotate through the coupler 223, and under the guiding action of the guide rail 231 and the slider 232, the lead screw 221 drives the first connecting member 30 to move downwards through the nut 222, so as to drive the ram 70 to move downwards. The flexible member 73 on the ram 70 is then pressed against the workpiece. Along with the increase of the pressure, the third connecting piece 71 presses against one end of the first elastic piece 53 close to the pressure head 70, one end of the first elastic piece 53 far from the pressure head 70 presses against the second connecting piece 51, and at the moment, the first elastic piece 53 is compressed to realize the buffer function. Meanwhile, the pressure head 70 is pressed against the pressure sensor 60, the pressure sensor 60 feeds back the pressure applied to the workpiece by the pressure head 70 to the control component, the control component controls the magnitude of the pressure applied to the workpiece by the pressure head 70, when the pressure reaches a preset value, the control component controls the driving component 21 to drive the sliding block 232 to an initial position, and the driving component 21 stops working.

It is noted that in the description herein, references to the description of "some embodiments," "other embodiments," or the like, are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is only a preferred embodiment of the present invention and the technical principles applied thereto. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims (10)

1. Press, its characterized in that includes:

a mounting (10);

a drive assembly (20) disposed on the mount (10);

the first connecting piece (30) is arranged at the output end of the driving assembly (20);

the buffer assembly (50) is arranged at the tail end of the first connecting piece (30), a pressure head (70) is connected to the tail end of the buffer assembly (50), the pressure head (70) is used for press-fitting a workpiece, the driving assembly (20) can drive the first connecting piece (30) to drive the buffer assembly (50) and the pressure head (70) on the buffer assembly to move along a preset direction, and when the pressure head (70) presses the workpiece, the buffer assembly (50) is used for buffering the pressure head (70); and

a pressure sensor (60) disposed between the ram (70) and the damping assembly (50), the pressure sensor (60) for detecting a pressure exerted by the ram (70) on the workpiece.

2. The press according to claim 1, characterized in that said buffer assembly (50) comprises:

a second connecting member (51) connected to the first connecting member (30);

the guide shaft (52) penetrates through the second connecting piece (51) along the preset direction and can slide along the second connecting piece (51), and one end of the guide shaft (52) is connected to the pressure head (70);

the first elastic piece (53) is sleeved on the guide shaft (52), one end of the first elastic piece (53) is abutted to the second connecting piece (51), and the other end of the first elastic piece (53) is abutted to the pressure head (70).

3. The press according to claim 2, characterized in that said buffer assembly (50) further comprises:

a second elastic piece (55), one end of the guide shaft (52) far away from the pressure head (70) extends out of the second connecting piece (51), the second elastic piece (55) is sleeved on the part of the guide shaft (52) extending out of the second connecting piece (51), and one end of the second elastic piece (55) abuts against the second connecting piece (51);

and the limiting piece (54) is arranged at one end, far away from the pressure head (70), of the guide shaft (52), and the other end of the second elastic piece (55) is abutted against the limiting piece (54).

4. The press according to claim 1, characterized in that said drive assembly (20) comprises:

a drive member (21) provided on the mounting member (10);

transmission portion (22), connect in the output of driving piece (21), first connecting piece (30) set up in the output of transmission portion (22), driving piece (21) can pass through transmission portion (22) drive pressure head (70) are followed preset direction reciprocating motion.

5. The press according to claim 4, characterized in that the transmission (22) comprises:

the lead screw (221) is connected to the output end of the driving piece (21) and extends along the preset direction;

and the nut (222) is screwed on the screw rod (221) and is connected with the first connecting piece (30).

6. The press of claim 5, further comprising:

the supporting seat (40), the supporting seat (40) is installed on the installed part (10), and the lead screw (221) is rotatably connected to the supporting seat (40).

7. The press according to claim 1, characterized in that said driving assembly (20) further comprises a sliding member (23), said sliding member (23) comprising a guide rail (231) and a slider (232), said guide rail (231) being mounted on said mounting (10) and extending along said preset direction, said slider (232) being connected with said first connection member (30) and being slidingly connected with said guide rail (231).

8. The press according to claim 7, characterized in that the press further comprises a photoelectric assembly (80), the photoelectric assembly (80) comprises a shielding member (81) and a first photoelectric sensor (82), a second photoelectric sensor (83) and a third photoelectric sensor (84) which are arranged on the mounting member (10) and are sequentially arranged from top to bottom, the first photoelectric sensor (82) is used for detecting an upper limit position of the sliding block (232), the second photoelectric sensor (83) is used for detecting an origin position of the sliding block (232), the third photoelectric sensor (84) is used for detecting a lower limit position of the sliding block (232), and the shielding member (81) is arranged on the first connecting member (30) and is positioned on one side of the sliding block (232).

9. The press according to any one of claims 1 to 8, characterised in that the side of the ram (70) which is in contact with the workpiece is provided with a flexible member (73).

10. Press according to claim 9, characterised in that said flexible element (73) is made of an insulating material.

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